apps/codecs/lib/codeclib.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Dave Chapman
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #ifndef __CODECLIB_H__
  23 #define __CODECLIB_H__
  24
  25 #include "config.h"
  26 #include "codecs.h"
  27 #include <sys/types.h>
  28
  29 extern struct codec_api *ci;
  30 extern size_t mem_ptr;
  31 extern size_t bufsize;
  32 extern unsigned char* mp3buf;     /* The actual MP3 buffer from Rockbox                 */
  33 extern unsigned char* mallocbuf;  /* The free space after the codec in the codec buffer */
  34 extern unsigned char* filebuf;    /* The rest of the MP3 buffer                         */
  35
  36 /* Standard library functions that are used by the codecs follow here */
  37
  38 /* Get these functions 'out of the way' of the standard functions. Not doing
  39  * so confuses the cygwin linker, and maybe others. These functions need to
  40  * be implemented elsewhere */
  41 #define malloc(x) codec_malloc(x)
  42 #define calloc(x,y) codec_calloc(x,y)
  43 #define realloc(x,y) codec_realloc(x,y)
  44 #define free(x) codec_free(x)
  45 #define alloca(x) __builtin_alloca(x)
  46
  47 void* codec_malloc(size_t size);
  48 void* codec_calloc(size_t nmemb, size_t size);
  49 void* codec_realloc(void* ptr, size_t size);
  50 void codec_free(void* ptr);
  51
  52 void *memcpy(void *dest, const void *src, size_t n);
  53 void *memset(void *s, int c, size_t n);
  54 int memcmp(const void *s1, const void *s2, size_t n);
  55 void *memmove(void *s1, const void *s2, size_t n);
  56
  57 size_t strlen(const char *s);
  58 char *strcpy(char *dest, const char *src);
  59 char *strcat(char *dest, const char *src);
  60 int strcmp(const char *, const char *);
  61
  62 void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *));
  63
  64 /*MDCT library functions*/
  65
  66 extern void mdct_backward(int n, int32_t *in, int32_t *out);
  67
  68 #if defined(CPU_ARM) && (ARM_ARCH == 4)
  69 /* optimised unsigned integer division for ARMv4, in IRAM */
  70 unsigned udiv32_arm(unsigned a, unsigned b);
  71 #define UDIV32(a, b) udiv32_arm(a, b)
  72 #else
  73 /* default */
  74 #define UDIV32(a, b) (a / b)
  75 #endif
  76
  77 /* TODO figure out if we really need to care about calculating
  78    av_log2(0) */
  79 #ifdef CPU_ARM
  80 #if ARM_ARCH > 5
  81 static inline unsigned int av_log2(uint32_t v)
  82 {
  83     unsigned int r;
  84     asm volatile("clz %[r], %[v]\n\t" /* count leading zeroes */
  85                  "rsb %[r], %[r], #31\n\t" /* r = 31 - leading zeroes */
  86                  "usat %[r], #5, %[r]\n\t" /* unsigned saturate r so -1 -> 0 */
  87                  :[r] "=r" (r) : [v] "r" (v));
  88     return(r);
  89 }
  90 #elif ARM_ARCH > 4
  91 static inline unsigned int av_log2(uint32_t v)
  92 {
  93     return v ? 31 - __builtin_clz(v) : 0;
  94 }
  95 #endif
  96 #else /* CPU_ARM */
  97 /* From libavutil/common.h */
  98 extern const uint8_t ff_log2_tab[256] ICONST_ATTR;
  99
 100 static inline unsigned int av_log2(unsigned int v)
 101 {
 102     int n;
 103
 104     n = 0;
 105     if (v & 0xffff0000) {
 106         v >>= 16;
 107         n += 16;
 108     }
 109     if (v & 0xff00) {
 110         v >>= 8;
 111         n += 8;
 112     }
 113     n += ff_log2_tab[v];
 114
 115     return n;
 116 }
 117 #endif
 118
 119 /* Various codec helper functions */
 120
 121 int codec_init(void);
 122 void codec_set_replaygain(struct mp3entry* id3);
 123
 124 #ifdef RB_PROFILE
 125 void __cyg_profile_func_enter(void *this_fn, void *call_site)
 126     NO_PROF_ATTR ICODE_ATTR;
 127 void __cyg_profile_func_exit(void *this_fn, void *call_site)
 128     NO_PROF_ATTR ICODE_ATTR;
 129 #endif
 130
 131 #endif /* __CODECLIB_H__ */